// This file is part of Eigen, a lightweight C++ template library
// for linear algebra.
//
// Copyright (C) 2020 Sebastien Boisvert <seb@boisvert.info>
//
// This Source Code Form is subject to the terms of the Mozilla
// Public License v. 2.0. If a copy of the MPL was not distributed
// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.

#ifndef EIGEN_MISC_MOVABLE_SCALAR_H
#define EIGEN_MISC_MOVABLE_SCALAR_H

#include <vector>

namespace Eigen {
template<typename Scalar, typename Base = std::vector<Scalar>>
struct MovableScalar : public Base
{
	MovableScalar() = default;
	~MovableScalar() = default;
	MovableScalar(const MovableScalar&) = default;
	MovableScalar(MovableScalar&& other) = default;
	MovableScalar& operator=(const MovableScalar&) = default;
	MovableScalar& operator=(MovableScalar&& other) = default;
	MovableScalar(Scalar scalar)
		: Base(100, scalar)
	{
	}

	operator Scalar() const { return this->size() > 0 ? this->back() : Scalar(); }
};

template<>
struct NumTraits<MovableScalar<float>> : GenericNumTraits<float>
{};
}

#endif
